Address style cleanups in Utils

As pointed out by Joe on
https://gerrit.causes.com/#/c/22332/2/lib/overcommit/utils.rb

Change-Id: I5cc01a344f2b9ca9098969b72ff21ad3c91eb430
Reviewed-on: https://gerrit.causes.com/22356
Reviewed-by: Aiden Scandella <aiden@causes.com>
Tested-by: Aiden Scandella <aiden@causes.com>